Variable Lens System

a lens system and variable technology, applied in the field of optical lens systems, can solve the problems of limited magnification of known electrowetting lenses, limited field flattening and aberration reduction possibilities, and the module is only suitable for low-resolution cameras, so as to reduce building height, reduce building height, and long focal range
US20080231966A1Inactive Publication Date: 2008-09-25KONINKLIJKE PHILIPS ELECTRONICS NV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KONINKLIJKE PHILIPS ELECTRONICS NV
Publication Date
2008-09-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

A compact and substantially achromatic optical lens system (100, 200) comprising an electrowetting lens (104, 204) is provided. The optical lens system is using an electrowetting lens in which at least one of the entrance window surface (117, 217) or exit window surfaces (219), being in contact with one of the fluids (112, 212, 113, 213), has a curvature. When the sign of the curvature of that surface has the same sign as the curvature of the meniscus when no voltage is applied, a low building height is achieved. The optical element (104, 204) not only acts as a focussing or zooming device, but that it also acts as an aberration reduction element for the other elements in the optical lens system (100, 200).
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to an optical lens system using a variable lens comprising a first fluid and a second fluid which are in contact over a meniscus, to an imaging system including such an optical lens system and to a method of designing such a variable lens system and optical imaging system.BACKGROUND OF THE INVENTITON

[0002] A variable lens is a device in which one or more properties of the lens can be controllably adjusted, e.g. in which the focal length or the position of the lens can be altered. An optical lens system is used to image an object on to an image sensor. This optical lens system can comprise a variable lens

[0003] The general trend in the development of image sensors for camera modules is that they constantly increase in resolution. Starting from the low-resolution sensors such as the 100k-pixels range CIF image sensors and 300k-pixels image sensors, there are presently high-resolution mega-pixel image sensors available. These high...

Claims

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